Improvement in combined latch and lock



2 Sheets-Sheet 1.

H; H. DANIELS. (lombinedL-atch and Look.

N. PETERS, PHOTO-LITHOGRAPHER, WASHINGTON, D. c

2 Shuts-Sheet 2..

r H. DANIELS. Combined Latch and Look.

Patented May 20, I879.

UNITED STATES PATENT OFFIC.

HENRY H. DANIELS, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN COMBINED LATCH AND LOCK.

Specification forming part of Letters Patent No. 215,580, dated May 20,1879; application filed October 7, 1878.

To all whom it may concern:

Be it known that I, HENRY H. DANIELS, of

. Philadelphia, Pennsylvania, have invented a new and useful Improvementin Locks, of which the following is a specification.

The main object of my invention is to so construct a door-lock as toincrease its security without materially increasing its cost.

In the accompanying drawings, Figures 1, 2, 3, and 4, Sheet 1, and Fig.5, Sheet 2, are face views of the lock with the cover-plate removed andthe working parts in different positions; Fig. 6, a transverse verticalsection on the line 12, Fig. 5; Fig. 7, a sectional plan on the line 34, Fig. 5; and Fig. 8, a diagram showing the method of operating. thelocking-bolt with a key.

A is the casing of thelock B, the latch-bolt; D, the locking-bolt; E,the tumbler, and F the key-hole.

The inner end of the latch-bolt Bis connected, as usual, to aspring-lever, a, which is acted upon by an arm upon a huh, I), anopening in the latter receivin g the spindle of a kn ob, d, which isarranged upon the outside of the door, and thus serves as a means ofoperating the latchbolt in the ordinary manner.

Instead of the spindle of the knob d extending completely through thelock and door, as usual, and being provided on the inside of the latterwith another knob, the knob c on the inside of the door is carried by aspindle independent of that of the knob d, and this independent spindleis adapted to an opening in a hub f, which is secured to or forms partof an arm", Gr. The conformation of this arm G is peculiar, it having atthe lower end a finger, g,

' and at the upper end adjacent to the hub f a projection, 12, while thefront edge, i, of the arm is curved and has formed in it a notch, m.

The tumbler E is pivoted to the lock-case and is made in the form of abell-crank lever, having at the end of one of its arms a lug, s, whichis adapted to one or other of three notches, t, t and t formed in theupper edge of the locking-bolt D, the lug thereby serving to retain thelocking-bolt in the three positions which it assumesthat is to say,either fully extended, partially extended, or entirely retracted.

The tumbler E is acted upon by a spring, h,

the tendency of which is to depress the end of the arm carrying the lug8, thereby causing the said lug to enter one of the notches in the boltD.

The operation of the tumbler so as to lift I the lug 8 out of thenotches in the bolt Dis effected either by a key inserted through thekeyhole F or by means of the projection n on the arm G, said projectionacting on the bent end 9 of the upwardly-projecting arm of the tu'mbler.

The latch-bolt B has two projecting pins, w

and a, through the medium of which said lockbolt'is operated, and lockedin position by the arm G, as described hereinafter. These pins passentirely through the latch-bolt and project from both sides of the same,whereby said bolt/may be adjusted so as to form either a right or lefthand look.

A lug, y, projects from the bolt D in such a position that it will beacted upon by the lower end of the arm G as the latter is vibrated, ashereinafter set forth.

The rear end of the bolt D extends downward, so as to form a block, J,which, when the bolt is fully extended, covers the key-hole Fandprevents the insertion of a key.

In the lower front corner of the lock-casing is arranged a latch-lever,M, which acts in conjunction with a recess,'r, in the under side of thebolt D, so as to retain the latter in its extended or locked condition,the operation of the lever being effected by a thumb-piece, N, on theinner side of the lock-casing.

Theoperation of the lockis as follows: When the parts are in theposition shown in Fig. 1 the lockin g-bolt D is retracted, andthelatch-boltB is in condition for being operated either from theoutside of the door through the medium of the knob d, hub b, and levera, or from the inside of the door through the medium of the knob c, hubf, and arm G, the upper portion of the latter acting upon the pin 00 onthe latchbolt, and the finger g of the arm passing under the lug ylofthe locking-bolt, as shown by dotted lines.

When the parts are in the position shown. by full lines in Fig. 1, thelocking-bolt may be operated by a key inserted through the keyhole Feither from the inside or outside of the door, as shown in Fig. 8, oneof the wards of the key operating the tumbler E, and the other the boltD, in the usual manner. When operated by a key, however, the bolt D isonly projected to about one-half of its full extent, the lug s of thetumbler E resting in the middle notch, i, of the bolt.' This is done inorder that the block J on the bolt D will not come in contact with thekey and prevent the withdrawal of the latter from the key-hole.

In locking a door from the inside by means of the knob c, the latter isturned so as to cause a movement of the hub f and arm G in the directionof the arrows l in Figs. 1, 2, and 3. The first eifect of this movementof the arm G is to cause its projection n to strike the bent end 1; ofthe upwardl y-projectin g arm of the tumbler E, and thus cause the saidtumbler to turn on its pivot, so as to elevate the lug s from the notchtof the bolt D. (See Fig. 2. As the movement of the arm G continues itscurved front edge strikes the shoulder .2, formed by the enlarged headof the belt I), and causes the latter to move forward, this movementcontinuing until the parts assume the positions shown in Fig. 3. Thekey-hole F is now obstructed by the block J, the pin 20 on thelatch-lever rests in the notch in in the front edge of the arm G, sothat inward movement of the latch is prevented, and the lug s of thetumbler E rests in the notch t of the bolt D, so as to lock the latter,the end 1) of the upwardly-projecting arm oi" the tumbler restingagainst the under side of the projec tion a of the arm G, and therebypreventing the latter from falling by its own weight from the positionto which it has been moved.

The latch-bolt being held by the arm Gand the key-hole obstructed by theblock J, any attempt to open the door by means of a key, or by operatingthe outer knob, 01, must necessarily be nnavailin g, while any attemptto move the bolt by boring through the door, so as to gain access to theouter end of the spindle of the knob 0, may be frustrated by theadjustment of the locking-latch m, as shown in Fig. 3.

1n unlocking the door from the inside the knob e is turned so as tocausea movement of the arm G in the direction of the arrows 2 in Figs.1, 3, 4, and 5. The parts being in the positions shown in Fig. 3, (withthe exception of the latch M, which is first turned down,) the firsteffect of this movement will be to free the pin 10 on the bolt B andelevate the lug s of the tumbler E clear of the notches of the belt I).The finger g of the arm G is then brought to bear on the lug g of thebolt D, as shown in Fig.4, the said bolt, as the arm continues to move,being retracted until it reaches about the position shown in Fig. 5. Bythis time the end of the finger g of the arm G has slipped down belowthe log 3 and said arm G continues to swing without operating the boltD, the upper portion of the arm, however, acting on the pin w of thelatch-bolt B, so as to retract the latter. This movement continues untilthe log y is struck by the body of the arm G at the base of the fingery, when thebolt D will be fully retracted, as shown by dotted lines inFig. 1.

I am aware thatitis not new to operate both the latch-bolt andlocking-bolt of a look by the same knob-spindle, and this therefore I donot claim, broadly; but

I claim as my invention- 1. The combination, in a lock, of the latchbolt B and locking-bolt D, with a hub, f, adapted to a knob-spindle,andhavin g an arm, G, for acting on pins or projections on both bolts Band D, all substantially as specified.

2. The combination, in a lock, of the latch bolt B and locking-bolt D,the independent knobs d and e on opposite sides of the case, thelatch-bolt operating hub 1) adapted to the spindle of the knob (I, andthe hub fadapted to the spindle of the knob e, and having an arm, G, foracting on both the latch-bolt B and locking-boltD,all as set forth.

3. The combination of the lock-case having a key-hole, F, the latch-boltB, the lockingbolt D, the tumbler E, and the hub f, having an arm,G, foroperating the bolt D, and a lug, a, for operating the tumbler, allsubstantially as set forth.

i. The combination of the arm G, having a finger, g, with the bolt D andits lug y, and the bolt B and its pin a, all as specified.

5. The combination of the bolt B, having a pin, 10, and the bolt D,having a shoulder, z, with the arm G, which operates the .bolt D, andhas a notch, m, adapted for the reception of the pin 10, all as setforth.

6. The combination of the notched bolt D, the tumbler E, having a lug,s, and projection 12, and the operating-arm G, having a projection, a,all as described.

7. The combination of the lock-casing A, having a key-hole, F, the boltD, having a shoulder, z, a block, J, and notches t, t, and t the tumblerE, having a lug, s, and projection p, and the operating-arm G, having alug, a, all substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HENRY H. DANIELS.

Witnesses:

ALEX. PATTERSON, HARRY SMITH.

dink-E

